I'm just buying an F36 sloop and have to clear a fixed bridge with vertical clearance of 65'- can anyone tell me what the height above water is for this model? Tidal range is 4.5' which may help...Thanks in advance for any help

So a quick look on the internet showed your P dimension of your main (luff) to be 45ft. Even if your boom is 10 ft above the water, that only gets you to 55 ft. You possibly have an antenna or Windex on top, too. You got lots of room...

If you want to double check free advice off the internet... Consider measuring the height. For a conservative measurement, do the toerail to water and using the halyard, mast to toe rail.